利用GPS资料求解中国大陆应变场的新方法
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摘要
探讨利用边长变化方法解算区域应变场,并用该方法对1999—2001年中国大陆及周边区域网GPS测站边长变化量进行分析,给出了该期间的中国大陆应变率场变化。分析结果表明:对大范围、密集的GPS测站的边长变化量进行连续变形分析,既能揭示中国大陆地壳应变的总体分布,又能显示局部地区的构造获得。总体上,中国大陆构造的水平变形强度在南北地震带产生突变,呈现出西强东弱、南强北弱的态势。而昆仑山地块中部、鲜水河断裂带和云南中部地区,其应变速率最大。天山东部具有拉张环境。
A new method for calculating strains based on side length changes is proposed.By use of this method the strains distribution of Chinese mainland in the period of 1999 to 2001 are calculated.The results show that the analysis of the continuous deformation in the large-scale and dense GPS velocity field can reveal not only the integral tectonic characters of Chinese mainland but also the tectonic deformation which have a mutation in the South-North Seismic Belt and is stronger in the west than in the east and stronger in the south than in the north.The largest strain rates are found in the areas as Kunlun block,Xianshuihe fault zone and central Yunnan,and the variation of velocity is very rapid,and extensive strain is found in the eastern part of Tianshan.
A new method for calculating strains based on side length changes is proposed.By use of this method the strains distribution of Chinese mainland in the period of 1999 to 2001 are calculated.The results show that the analysis of the continuous deformation in the large-scale and dense GPS velocity field can reveal not only the integral tectonic characters of Chinese mainland but also the tectonic deformation which have a mutation in the South-North Seismic Belt and is stronger in the west than in the east and stronger in the south than in the north.The largest strain rates are found in the areas as Kunlun block,Xianshuihe fault zone and central Yunnan,and the variation of velocity is very rapid,and extensive strain is found in the eastern part of Tianshan.
引文
1Wu Jicang,et al.Research on an intraplate movement modelby inversion of GPS data in North China[J].J Geodyn.,2001,31(5):507-518.
2Wu Yun,et al.The initial discussion of the crust deformationof China and its adjacent area based on GPS measurements[J].Acta Seismologica Sinca,1999,21(5):545-553.
3伍吉仓,邓康伟,陈永奇.用边长变化结果计算地应变及块体划分[J].大地测量与地球动力学,2002,(5):35-38.
4杨少敏,等.用双三次样条函数和GPS资料反演现今中国大陆构造形变场[J].大地测量学与地球动力学,2002,(1):68-75.
5杨国华,等.由GPS观测结果推到中国大陆现今水平应变场[J].地震学报,2002,24(4):337-347.
6沈正康,等.中国大陆现今构造应变率场及其动力学成因研究[J].地学前缘,2003,10(增):93-100.
7张静华,等.用GPS测量结果研究华北现今构造形变场[J].大地测量学与地球动力学,2004,(3):40-46.
8游新兆,等.中国大陆地壳现今运动的GPS测量结果与初步分析[J].地壳形变与地震,2001,(3):1-8.
9朱守彪,等.利用广义应变花法计算地应变场[J].防灾技术高等专科学校学报,2006,5(2):1-5.
10武艳强,等.利用多面函数整体求解GPS应变场的方法及应用[J].武汉大学学报(信息科学版),2009,34(9):1 085-1 087.
11武艳强,等.利用最小二乘配置在球面上整体解算GPS应变场的方法及应用[J].地球物理学报,2009,52(7):1 707-1 714.
12王留朋,等.GAMIT在LINUX操作系统上的安装和使用[J].全球定位系统,2006,(6):43-46.
13Eringen AC.Mechanics of continua[M].John Wiley&So-na,Inc.,1980.
14杨本立,等.超定方程组最小二乘行处理法[J].云南师范大学学报,1997,17(1):1-4.
2Wu Yun,et al.The initial discussion of the crust deformationof China and its adjacent area based on GPS measurements[J].Acta Seismologica Sinca,1999,21(5):545-553.
3伍吉仓,邓康伟,陈永奇.用边长变化结果计算地应变及块体划分[J].大地测量与地球动力学,2002,(5):35-38.
4杨少敏,等.用双三次样条函数和GPS资料反演现今中国大陆构造形变场[J].大地测量学与地球动力学,2002,(1):68-75.
5杨国华,等.由GPS观测结果推到中国大陆现今水平应变场[J].地震学报,2002,24(4):337-347.
6沈正康,等.中国大陆现今构造应变率场及其动力学成因研究[J].地学前缘,2003,10(增):93-100.
7张静华,等.用GPS测量结果研究华北现今构造形变场[J].大地测量学与地球动力学,2004,(3):40-46.
8游新兆,等.中国大陆地壳现今运动的GPS测量结果与初步分析[J].地壳形变与地震,2001,(3):1-8.
9朱守彪,等.利用广义应变花法计算地应变场[J].防灾技术高等专科学校学报,2006,5(2):1-5.
10武艳强,等.利用多面函数整体求解GPS应变场的方法及应用[J].武汉大学学报(信息科学版),2009,34(9):1 085-1 087.
11武艳强,等.利用最小二乘配置在球面上整体解算GPS应变场的方法及应用[J].地球物理学报,2009,52(7):1 707-1 714.
12王留朋,等.GAMIT在LINUX操作系统上的安装和使用[J].全球定位系统,2006,(6):43-46.
13Eringen AC.Mechanics of continua[M].John Wiley&So-na,Inc.,1980.
14杨本立,等.超定方程组最小二乘行处理法[J].云南师范大学学报,1997,17(1):1-4.
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